15'' IA 187 sealed ported or 4th order BP?

[rosshimself13 10+ year member]

got it for the girl wont be building it anytime soon as the army told me i have to move in about 2.5 weeks but after that i will be putting it in her honda crv.. not sure about power yet they arent rated high so maybe 500w max

what would you do for a low power build?

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[RAM_Designs 5,000+ posts]

Either-or, BP will probably give you a slight edge in output but take up more room.

 

[rosshimself13 10+ year member]

View attachment 26520104

its my first try at a band pass

and i still **** at sketchup but my main question is would this be ok or should i bend the port again?

also is that too much port?

 

[ThatChevyGuy 5,000+ posts]

go ported at 28 hz

thatll sound loud

 

[rosshimself13 10+ year member]

go ported at 28 hz
thatll sound loud

i dont personally see the point in tuning that low when we wont be watching movies and its only going to get about 500 watts

with a FS of 35hz and only 22mm of xmax P2P i dont see this as a low end monster

also i wanna try a 4th order after seeing cricket last weekend

 

[RAM_Designs 5,000+ posts]

What is that BP tuned to? Looks like a long port...shoot for 20-23in^2 per ft^3 of ported volume, tune in the upper 40's.

 

[rosshimself13 10+ year member]

it turned out about 50.5 hz

 

[galacticmonkey 5,000+ posts]

Shrink it come to tune it around 45-47hz. Whats the sealed chamber? Go for around 1.6 cubes.

 

[rosshimself13 10+ year member]

will work on that.. sealed is 1.9, but after the sub it would be 1.79

appreciate it like i said its a first and i went like 30in of port for every cube... lol will post up when i have time

 

[rosshimself13 10+ year member]

i ran into a issue with my box size... tried to tune to 47 hz but it ended up being exactly 4 inches from the back wall, which is my port width, that means i add 4 inches to the length correct? if so it gives me a tuning of 43 hz... instead of 47

View attachment 26520243

 

[rosshimself13 10+ year member]

opinions from those who know?

 

[RAM_Designs 5,000+ posts]

^^^yes, that will extend your port throughout the corner area.